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Ohio's State Industrial Products recently began notifying an undisclosed number of current and former employees that their personal information had been illegally accessed.

On January 23, 2014, the FBI informed the company that "unauthorized persons" had accessed the data, and provided State Industrial with a list of the affected employees and the information exposed, which included names, addresses, e-mail addresses, Social Security numbers, driver's license numbers, genders, birthdates, phone numbers, employee IDs and dates of hire.

"The moment we learned of this incident, we immediately launched an investigation to learn how someone gained access to this information," State Industrial CEO Seth Uhrman wrote in the notification letter [PDF]. "As part of the investigation, we hired a computer security firm to examine our computer network. Though our investigation is just beginning and we do not know how this information was obtained, we wanted to immediately notify all employees whose information was on the list provided to us by the FBI."

According to the notification letter, the stolen data is being used to file fraudulent tax returns.